Hammock stand



FIG. 1 is a rear side view of the hammock stand; and

FIG. 2 is a front side thereof; and

FIG. 3 is a right side view thereof; and

FIG. 4 is a left side view thereof; and,

FIG. 5 is a perspective view thereof.

Wherein the dotted lines illustrated herein form no part of the claimed design and are illustrated for the purpose of use and environment. 

CLAIM The ornamental design for the hammock stand, as shown and described. 